Evaluation of sharpness measures and search algorithms for the auto focusing of high-magnification images
作者： Yi Yao , Besma Abidi , Narjes Doggaz , Mongi Abidi
DOI: 10.1117/12.664751
关键词:
摘要: Digital imaging systems with extreme zoom capabilities are traditionally found in astronomy and wild life monitoring. More recently, the need for such has extended to long range surveillance wide area monitoring as forest fires, airport perimeters, harbors, waterways. Auto-focusing is an indispensable function designed applications. This paper studies feasibility of image based passive auto-focusing control high magnification on off-the-shelf telescopes digital cameras/camcorders, concentration two associated elements: cost (usually sharpness measure) search strategy. An extensive review existing measures algorithms conducted their performances compared. In addition, applicability adaptability a high magnifications (50×~1500×) addressed. study builds up foundation development schemes particular applications magnification systems.
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